The vector stencils library "Transformers and windings" contains 29 element symbols of transformers, windings, couplers, metering devices, transductors, magnetic cores, chokes, and a variometer.
Use it to design the electromechanical device schematics and electronic circuit diagrams.
"A transformer is an electrical device that transfers energy between two circuits through electromagnetic induction. Transformers may be used in step-up or step-down voltage conversion, which 'transforms' an AC voltage from one voltage level on the input of the device to another level at the output terminals. This special function of transformers can provide control of specified requirements of current level as an alternating current source, or it may be used for impedance matching between mismatched electrical circuits to effect maximum power transfer between the circuits.
A transformer most commonly consists of two windings of wire that are wound around a common core to induce tight electromagnetic coupling between the windings. The core material is often a laminated iron core. The coil that receives the electrical input energy is referred to as the primary winding, while the output coil is called the secondary winding.
An alternating electric current flowing through the primary winding (coil) of a transformer generates an electromagnetic field in its surroundings and a varying magnetic flux in the core of the transformer. By electromagnetic induction this magnetic flux generates a varying electromotive force in the secondary winding, resulting in a voltage across the output terminals. If a load impedance is connected across the secondary winding, a current flows through the secondary winding drawing power from the primary winding and its power source." [Transformer. Wikipedia]
"An electromagnetic coil (or simply a "coil") is formed when a conductor is wound around a core or form to create an inductor or electromagnet. When electricity is passed through a coil, it generates a magnetic field. One loop of wire is usually referred to as a turn or a winding, and a coil consists of one or more turns. For use in an electronic circuit, electrical connection terminals called taps are often connected to a coil. Coils are often coated with varnish or wrapped with insulating tape to provide additional insulation and secure them in place. A completed coil assembly with one or more set of coils and taps is often called the windings.
Windings are used in transformers, electric motors, inductors, solenoids, loudspeakers, and many other applications." [Electromagnetic coil. Wikipedia]
The shapes example "Design elements - Transformers and windings" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Use it to design the electromechanical device schematics and electronic circuit diagrams.
"A transformer is an electrical device that transfers energy between two circuits through electromagnetic induction. Transformers may be used in step-up or step-down voltage conversion, which 'transforms' an AC voltage from one voltage level on the input of the device to another level at the output terminals. This special function of transformers can provide control of specified requirements of current level as an alternating current source, or it may be used for impedance matching between mismatched electrical circuits to effect maximum power transfer between the circuits.
A transformer most commonly consists of two windings of wire that are wound around a common core to induce tight electromagnetic coupling between the windings. The core material is often a laminated iron core. The coil that receives the electrical input energy is referred to as the primary winding, while the output coil is called the secondary winding.
An alternating electric current flowing through the primary winding (coil) of a transformer generates an electromagnetic field in its surroundings and a varying magnetic flux in the core of the transformer. By electromagnetic induction this magnetic flux generates a varying electromotive force in the secondary winding, resulting in a voltage across the output terminals. If a load impedance is connected across the secondary winding, a current flows through the secondary winding drawing power from the primary winding and its power source." [Transformer. Wikipedia]
"An electromagnetic coil (or simply a "coil") is formed when a conductor is wound around a core or form to create an inductor or electromagnet. When electricity is passed through a coil, it generates a magnetic field. One loop of wire is usually referred to as a turn or a winding, and a coil consists of one or more turns. For use in an electronic circuit, electrical connection terminals called taps are often connected to a coil. Coils are often coated with varnish or wrapped with insulating tape to provide additional insulation and secure them in place. A completed coil assembly with one or more set of coils and taps is often called the windings.
Windings are used in transformers, electric motors, inductors, solenoids, loudspeakers, and many other applications." [Electromagnetic coil. Wikipedia]
The shapes example "Design elements - Transformers and windings" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Transformer and winding symbols
The vector stencils library "Transformers and windings" contains 29 element symbols of transformers, windings, couplers, metering devices, transductors, magnetic cores, chokes, and a variometer.
Use it to design the electromechanical device schematics and electronic circuit diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-electrical
Use it to design the electromechanical device schematics and electronic circuit diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-electrical
Coaxial choke
Transductor
Saturating transformer
1-phase induction voltage regulator
Triplex induction voltage regulator
Induction voltage regulator
Current transformer 2
Current transformer 3
Potential transformer 2
Potential transformer with 3 windings
Outdoor metering device
Linear coupler
Magnetic core, 1 line
Magnetic core, 2 lines
Choke
Variometer
Air-core transformer
Magnetic-core transformer
Air-core transformer, 1 winding adjustable
Magnetic-core transformer, 1 winding adjustable
Air-core transformer, 2 windings adjustable
Magnetic-core transformer, 2 windings adjustable
Air-core transformer, mutual inductor
Magnetic-core transformer, mutual inductor
Transformer 2
Adjustable transformer, 1 winding
Adjustable transformer, mutual inductor
Current transformer 1
Potential transformer
The vector stencils library "Switches and relays" contains 58 symbols of electrical contacts, switches, relays, circuit breakers, selectors, connectors, disconnect devices, switching circuits, current regulators, and thermostats for electrical devices.
"In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.
The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts, which are connected to external circuits. Each set of contacts can be in one of two states: either "closed" meaning the contacts are touching and electricity can flow between them, or "open", meaning the contacts are separated and the switch is nonconducting. The mechanism actuating the transition between these two states (open or closed) can be either a "toggle" (flip switch for continuous "on" or "off") or "momentary" (push-for "on" or push-for "off") type.
A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that a machine tool is in a position to accept another workpiece. Switches may be operated by process variables such as pressure, temperature, flow, current, voltage, and force, acting as sensors in a process and used to automatically control a system. ... A switch that is operated by another electrical circuit is called a relay. Large switches may be remotely operated by a motor drive mechanism. Some switches are used to isolate electric power from a system, providing a visible point of isolation that can be padlocked if necessary to prevent accidental operation of a machine during maintenance, or to prevent electric shock." [Switch. Wikipedia]
"A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.
A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called "protective relays"." [Relay. Wikipedia]
The shapes example "Design elements - Switches and relays" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
"In electrical engineering, a switch is an electrical component that can break an electrical circuit, interrupting the current or diverting it from one conductor to another.
The most familiar form of switch is a manually operated electromechanical device with one or more sets of electrical contacts, which are connected to external circuits. Each set of contacts can be in one of two states: either "closed" meaning the contacts are touching and electricity can flow between them, or "open", meaning the contacts are separated and the switch is nonconducting. The mechanism actuating the transition between these two states (open or closed) can be either a "toggle" (flip switch for continuous "on" or "off") or "momentary" (push-for "on" or push-for "off") type.
A switch may be directly manipulated by a human as a control signal to a system, such as a computer keyboard button, or to control power flow in a circuit, such as a light switch. Automatically operated switches can be used to control the motions of machines, for example, to indicate that a garage door has reached its full open position or that a machine tool is in a position to accept another workpiece. Switches may be operated by process variables such as pressure, temperature, flow, current, voltage, and force, acting as sensors in a process and used to automatically control a system. ... A switch that is operated by another electrical circuit is called a relay. Large switches may be remotely operated by a motor drive mechanism. Some switches are used to isolate electric power from a system, providing a visible point of isolation that can be padlocked if necessary to prevent accidental operation of a machine during maintenance, or to prevent electric shock." [Switch. Wikipedia]
"A relay is an electrically operated switch. Many relays use an electromagnet to mechanically operate a switch, but other operating principles are also used, such as solid-state relays. Relays are used where it is necessary to control a circuit by a low-power signal (with complete electrical isolation between control and controlled circuits), or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits as amplifiers: they repeated the signal coming in from one circuit and re-transmitted it on another circuit. Relays were used extensively in telephone exchanges and early computers to perform logical operations.
A type of relay that can handle the high power required to directly control an electric motor or other loads is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called "protective relays"." [Relay. Wikipedia]
The shapes example "Design elements - Switches and relays" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Switch and relay symbols
The vector stencils library "Valve assembly" contains 141 symbols of pressure and flow regulators, flow direction indicators, controls, and symbols to design flow paths of control valves.
Use these valve assembly shapes to design the engineering drawings of hydraulic and pneumatic valve assemblies in fluid power systems.
"Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.
The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals.
A control valve consists of three main parts in which each part exist in several types and designs: Valve's actuator, Valve's positioner, Valve's body.
" [Control valves. Wikipedia]
The shapes example "" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Use these valve assembly shapes to design the engineering drawings of hydraulic and pneumatic valve assemblies in fluid power systems.
"Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.
The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals.
A control valve consists of three main parts in which each part exist in several types and designs: Valve's actuator, Valve's positioner, Valve's body.
" [Control valves. Wikipedia]
The shapes example "" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Valve assembly symbols
The vector stencils library "Fluid power valves" contains 93 symbols of pre-made hydraulic and pneumatic valves, including directional control valves, flow control valves, pressure control valves, and electrohydraulic and electropneumatic valves.
"Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.
The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals.
A control valve consists of three main parts in which each part exist in several types and designs: Valve's actuator, Valve's positioner, Valve's body.
" [Control valves. Wikipedia]
The shapes example "Design elements - Fluid power valves" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
"Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.
The opening or closing of control valves is usually done automatically by electrical, hydraulic or pneumatic actuators. Positioners are used to control the opening or closing of the actuator based on electric, or pneumatic signals.
A control valve consists of three main parts in which each part exist in several types and designs: Valve's actuator, Valve's positioner, Valve's body.
" [Control valves. Wikipedia]
The shapes example "Design elements - Fluid power valves" was created using the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Fluid power valve symbols
The vector stencils library "Fluid power valves" contains 93 symbols of pre-made hydraulic and pneumatic valves, including directional control valves, flow control valves, pressure control valves, and electrohydraulic and electropneumatic valves.
Use these shapes to design fluid power diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-mechanical
Use these shapes to design fluid power diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Mechanical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-mechanical
2/2 valve, pneum., finite positions
2/2 valve, pneum., infinite positions
2/2 valve, pneum., ext., fin. pos.
2/2 valve, pneum., ext., infin. pos.
2/2 valve, hydr., finite positions
2/2 valve, hydr., infinite positions
2/2 valve, hydr., ext., fin. pos.
2/2 valve, hydr., ext., infin. pos.
3/2 valve, pneum., finite positions
3/2 valve, pneum., infinite positions
3/2 valve, pneum., ext., fin. pos.
3/2 valve, pneum., ext., infin. pos.
3/2 valve, hydr., finite positions
3/2 valve, hydr., infinite positions
3/2 valve, hydr., ext., fin. pos.
3/2 valve, hydr., ext., infin. pos.
4/2 valve, pneum., finite positions
4/2 valve, pneum., infinite positions
4/2 valve, pneum., ext., fin. pos.
4/2 valve, pneum., ext., infin. pos.
4/2 valve, hydr., finite positions
4/2 valve, hydr., infinite positions
4/2 valve, hydr., ext., fin. pos.
4/2 valve, hydr., ext., infin. pos.
5/2 valve, pneum., finite positions
5/2 valve, pneum., infinite positions
5/2 valve, pneum., ext., fin. pos.
5/2 valve, pneum., ext., infin. pos.
5/2 valve, hydr., finite positions
5/2 valve, hydr., infinite positions
5/2 valve, hydr., ext., fin. pos.
5/2 valve, hydr., ext., infin. pos.
4/3 valve, pneum., finite positions
4/3 valve, pneum., infinite positions
4/3 valve, pneum., ext., fin. pos.
4/3 valve, pneum., ext., infin. pos.
4/3 valve, hydr., finite positions
4/3 valve, hydr., infinite positions
4/3 valve, hydr., ext., fin. pos.
4/3 valve, hydr., ext., infin. pos.
5/3 valve, pneum., finite positions
5/3 valve, pneum., infinite positions
5/3 valve, pneum., ext., fin. pos.
5/3 valve, pneum., ext., infin. pos.
5/3 valve, hydr., finite positions
5/3 valve, hydr., infinite positions
5/3 valve, hydr., ext., fin. pos.
5/3 valve, hydr., ext., infin. pos.
Restrictor valve
Restrictor valve, adjustable
Gate-valve, norm. open
Gate-valve, norm. open, adj.
Gate-valve, norm. closed
Gate-valve, norm. closed, adj.
One-way restrictor
One-way restrictor, enclosed
Flow control, series flow
Flow control, temperature compensated
Flow control, bypass flow
Flow divider
Non-return, pilot controlled
Non-return, pilot contr., spring
Non-return, free
Non-return, spring loaded
Coupling (connect.), 1 valve
,-1-valve-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (connect.), both valves
,-both-valves-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (connect.), no valves
,-no-valves-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (connect.), 1 valve, encl.
,-1-valve,-encl.-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (connect.), both valves, encl.
,-both-valves,-encl.-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (connect.), no valves, encl.
,-no-valves,-encl.-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (discon.), 1 valve
,-1-valve-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (discon.), both valves
,-both-valves-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (discon.), no valves
,-no-valves-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (discon.), 1 valve, encl.
,-1-valve,-encl.-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (discon.), both valves, encl.
,-both-valves,-encl.-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Coupling (discon.), no valves, encl.
,-no-valves,-encl.-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
Shuttle valve
Priority shuttle valve
Quick exhaust
Cartridge valve
Pressure relief
Pressure relief, drain
Pressure relief, vent port
Pressure relief, drain, vent port
Pressure relief, var.
Pressure relief, var., drain
Pressure relief, var., vent port
Pressure relief, var., drain, vent port
Pressure relief 2
Pressure reducing, 1 stage
Pressure reducing, 2 stage
Pressure reducing, relief
Pressure relief (E)
-fluid-power-valves---vector-stencils-library.png--diagram-flowchart-example.png)
The vector stencils library "Analog and digital logic" contains 40 element symbols of logic (threshold) gates, bistable current switches, current controllers, regulators, electrical generators, and amplifiers.
Use it for drawing the digital and analog functions in electronic circuit diagrams and electrical schematics.
"Analogue electronics (or analog in American English) are electronic systems with a continuously variable signal, in contrast to digital electronics where signals usually take only two different levels. The term "analogue" describes the proportional relationship between a signal and a voltage or current that represents the signal." [Analogue electronics. Wikipedia]
"Digital electronics, or digital (electronic) circuits, represent signals by discrete bands of analog levels, rather than by a continuous range. All levels within a band represent the same signal state. Relatively small changes to the analog signal levels due to manufacturing tolerance, signal attenuation or parasitic noise do not leave the discrete envelope, and as a result are ignored by signal state sensing circuitry.
In most cases the number of these states is two, and they are represented by two voltage bands: one near a reference value (typically termed as "ground" or zero volts) and a value near the supply voltage, corresponding to the "false" ("0") and "true" ("1") values of the Boolean domain respectively.
Digital techniques are useful because it is easier to get an electronic device to switch into one of a number of known states than to accurately reproduce a continuous range of values.
Digital electronic circuits are usually made from large assemblies of logic gates, simple electronic representations of Boolean logic functions." [Digital electronics. Wikipedia]
The example "Design elements - Analog and digital logic" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Use it for drawing the digital and analog functions in electronic circuit diagrams and electrical schematics.
"Analogue electronics (or analog in American English) are electronic systems with a continuously variable signal, in contrast to digital electronics where signals usually take only two different levels. The term "analogue" describes the proportional relationship between a signal and a voltage or current that represents the signal." [Analogue electronics. Wikipedia]
"Digital electronics, or digital (electronic) circuits, represent signals by discrete bands of analog levels, rather than by a continuous range. All levels within a band represent the same signal state. Relatively small changes to the analog signal levels due to manufacturing tolerance, signal attenuation or parasitic noise do not leave the discrete envelope, and as a result are ignored by signal state sensing circuitry.
In most cases the number of these states is two, and they are represented by two voltage bands: one near a reference value (typically termed as "ground" or zero volts) and a value near the supply voltage, corresponding to the "false" ("0") and "true" ("1") values of the Boolean domain respectively.
Digital techniques are useful because it is easier to get an electronic device to switch into one of a number of known states than to accurately reproduce a continuous range of values.
Digital electronic circuits are usually made from large assemblies of logic gates, simple electronic representations of Boolean logic functions." [Digital electronics. Wikipedia]
The example "Design elements - Analog and digital logic" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
Analog and digital logic elements
The vector stencils library "Switches and relays" contains 58 symbols of electrical contacts, switches, relays, circuit breakers, selectors, connectors, disconnect devices, switching circuits, current regulators, and thermostats for electrical devices.
Use these shapes for drawing electrical diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-electrical
Use these shapes for drawing electrical diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/ solution-park/ engineering-electrical
SPST
SPDT
DPST
DPDT
Make contact
Break contact
Two way contact
Passing make-contact
Spring return
Stay put
Limit switch
Circuit breaker
Spring return 2
Spring return 3
Limit switch n/o
Limit switch n/c
2 position switch
3 position switch
4 position switch
Manual switch
Pushbutton make
Pushbutton break
Pushbutton 2-circuit
Selector switch
Shorting selector
Proximity limit switch
Time delay make
Time delay break
Time delay make 2
Time delay break 2
Safety interlock
Flow actuated
Liquid level actuated
Liquid level actuated 2
Gas flow actuated
Pressure actuated
Temperature actuated
Thermostat
Temperature switch
Inertia switch
Mercury switch
Mercury switch 2
Fuse
Switch disconnector
Isolator
Change-over contact
Relay contacts
Relay coil
Pilot light
Pilot light, push-to-test
Relay, alternating-current
Relay, magnetically polarized
Relay, slow-operate
Relay, slow-release
Relay
Relay, high speed
Relay, mechanically latched
Relay, permanent
- Back Pressure Regulator Symbol
- Switches and relays - Vector stencils library | Fan Regulator Symbol
- Switches and relays - Vector stencils library | Symbol Fan Regulator
- Switches Regulator Power Plug Symbol
- Symbol For Fan Regulator
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- Pressure Regulator Valve Symbol
- Instrument Symbol For Instrument Current Regulator
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- Transformers and windings - Vector stencils library | Symbol Of ...
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- Transformers and windings - Vector stencils library | Symbol Of ...
- Flow Diagram Pressure Regulator Symbol
- Electrical Symbols , Electrical Diagram Symbols | Transformers and ...
- Schematics Symbol Potential Transformer
- 2 Windings Transformer Symbol
- Electrical Symbols — Transformers and Windings | Transformers ...
- Electrical Symbols — Transformers and Windings | Transformers ...
- Electrical Chocke Symbol
